Marine Weather Message
Issued by NWS Boston, MA

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023
WHUS71 KBOX 211920
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
320 PM EDT Sat Jun 21 2025

ANZ232>235-237-220830-
/O.NEW.KBOX.SC.Y.0075.250622T1200Z-250623T0000Z/
Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
320 PM EDT Sat Jun 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 8 PM EDT SUNDAY...

* WHAT...Southwest winds 15 to 20 kt with gusts up to 30 kt and
  seas 3 to 5 feet expected.

* WHERE...In Massachusetts coastal waters, Nantucket Sound,
  Vineyard Sound and Buzzards Bay. In Rhode Island coastal
  waters, Rhode Island Sound and Block Island Sound.

* WHEN...From 8 AM to 8 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ255-256-220830-
/O.NEW.KBOX.SC.Y.0075.250622T1200Z-250623T0600Z/
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
320 PM EDT Sat Jun 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM SUNDAY TO 2 AM EDT
MONDAY...

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt and
  seas 3 to 5 feet expected.

* WHERE...In Massachusetts coastal waters, Coastal Waters
  extending out to 25 nm South of Marthas Vineyard and
  Nantucket. In Rhode Island coastal waters, Coastal Waters from
  Montauk NY to Marthas Vineyard extending out to 20 nm South of
  Block Island.

* WHEN...From 8 AM Sunday to 2 AM EDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ250-220830-
/O.NEW.KBOX.SC.Y.0075.250622T1200Z-250622T2200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
320 PM EDT Sat Jun 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 6 PM EDT SUNDAY...

* WHAT...Southwest winds 15 to 20 kt with gusts up to 25 kt and
  seas around 3 feet expected.

* WHERE...Coastal waters east of Ipswich Bay and the Stellwagen
  Bank National Marine Sanctuary.

* WHEN...From 8 AM to 6 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ254-220830-
/O.NEW.KBOX.SC.Y.0075.250622T1200Z-250623T0000Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
320 PM EDT Sat Jun 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 8 PM EDT SUNDAY...

* WHAT...Southwest winds 15 to 20 kt with gusts up to 30 kt and
  seas 3 to 5 feet expected.

* WHERE...Coastal waters from Provincetown MA to Chatham MA to
  Nantucket MA out 20 nm.

* WHEN...From 8 AM to 8 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ231-251-220830-
/O.NEW.KBOX.SC.Y.0075.250622T1200Z-250622T2200Z/
Cape Cod Bay-Massachusetts Bay and Ipswich Bay-
320 PM EDT Sat Jun 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 6 PM EDT SUNDAY...

* WHAT...Southwest winds around 15 kt with gusts up to 25 kt and
  seas 2 to 4 feet expected.

* WHERE...Cape Cod Bay and Massachusetts Bay and Ipswich Bay.

* WHEN...From 8 AM to 6 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ230-220830-
/O.NEW.KBOX.SC.Y.0075.250622T1200Z-250622T2200Z/
Boston Harbor-
320 PM EDT Sat Jun 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 6 PM EDT SUNDAY...

* WHAT...Southwest winds around 15 kt with gusts up to 25 kt and
  waves around 2 feet expected.

* WHERE...Boston Harbor.

* WHEN...From 8 AM to 6 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ236-220830-
/O.NEW.KBOX.SC.Y.0075.250622T1200Z-250622T2200Z/
Narragansett Bay-
320 PM EDT Sat Jun 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 6 PM EDT SUNDAY...

* WHAT...Southwest winds 10 to 15 kt with gusts up to 25 kt and
  waves 2 to 3 feet expected.

* WHERE...Narragansett Bay.

* WHEN...From 8 AM to 6 PM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$